APA (7th ed.) Citation

Webster,F.V. et.al. (1966). Traffic signals. Her Majesty's Stationery Office.

Chicago Style (17th ed.) Citation

Webster,F.V. et.al. Traffic Signals. London: Her Majesty's Stationery Office, 1966.

MLA (9th ed.) Citation

Webster,F.V. et.al. Traffic Signals. Her Majesty's Stationery Office, 1966.